I have 11 (5 pairs+1) 6H23 / 6922 Type 3 Platinum grade tubes for sale. All of them were Cryogenically Treated. I bought these for my Zen Ultra I no longer have. None of these were used for more than a few hours, some not at all. I have tested all of them on my MaxiPreamp tube tester. All of them test with low noise and NOS readings. When I get a chance I will list the tested gain of each triode or if interested let me know and I can send you the readings.

Asking $150 for all 11 tubes.

“The NOS 6H23n-EB tube is a very noticeable upgrade over the Sovtek 6922 tube and Electro Harmonix 6922 tube. They are incredibly durable and can handle the punishment of modern pre-amps, including those made by Audible Illusions. They excel in detail, speed, and soundstage. The highs have air and sound natural. This premium Russian built NOS 6922 tube replacement is also known by various Russian names, including 6N23n-EB, 6H23N-EB and 6N23. These are the hard to find NOS (new old stock) of premium quality in both sound and construction. The 6922 / 6DJ8 tube type is equivalent to the European ECC88 / E88CC tube and can be used in any 6922, 6DJ8 or ECC88 circuit.”

I sure will. If you are in the USA, I will take care of the shipping. I can send you the results of each triode and you can pick which tubes you want. If you send me a PM I may not able to respond until late tonight, but will as soon as possible. Thanks - Steve

Hello Steve:I will ask you to select the 5 tubes for me, please. If it appears that there are matched pairs, would you indicate this? I'm afraid I lack the knowledge to properly evaluate them. I haven't a clue as to the significance of those numbers.

Do you have a PayPal address for me to send payment? My mailing address will be included with the PayPal notification of my payment.

No problem. I will send you the most matched pairs. Will the 5th tube be a spare? If so, I make the 5th tube as close to your two pairs as I can. Otherwise, I will send you one that has each triode matched as close as I can with what is left. I am pretty sure all of them are close enough that in the real world it won't matter, but I will look at them when I get home later tonight. If your using Decware equipment that does not use any NFB, you do want them somewhat close and what I send you will be. Send me a pm and we can exchange info. If not, I will send you one as soon as I can.

I am down to two pairs of these tubes left. I am going to Fedex later tonight. If you send me your address, they will ship tonight. You can pay me anytime. $35 delivered for the pair if you think thats fair. Thanks!

I am down to two pairs of these tubes left. I am going to Fedex later tonight. If you send me your address, they will ship tonight. You can pay me anytime. $35 delivered for the pair if you think thats fair. Thanks!